Cannot see a process listening on 127.0.0.1

[Victor Sudakov <vas@sibptus.ru>]

Dear Colleagues,

There is a process listening on 127.0.0.1:8081 but for some reason
netstat/sockstat/ss do not show it listening on IPv4. Is this a bug or a
feature?

root@test4:~# telnet 127.0.0.1 8081
Trying 127.0.0.1...
Connected to 127.0.0.1.
Escape character is '^]'.
dd
HTTP/1.1 400 Bad Request
Connection: close

Connection closed by foreign host.
root@test4:~# netstat -lpn | grep 8081
tcp6       0      0 :::8081                 :::*                    LISTEN      10872/node /home/ad 
root@test4:~# 


Debian GNU/Linux 9.13 (stretch)

-- 
Victor Sudakov,  VAS4-RIPE, VAS47-RIPN
2:5005/49@fidonet http://vas.tomsk.ru/

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